Portable electric-lighting apparatus.



/ 11 11 11119011 PORTABLE ELECTRIC LIGHTING APPARATUS.

APPLIUATION FILED MAY 29, 1913..

.Patented May 19, 1914.

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To all 'whom it may concern:

Be it known'A that I, 'HIRAM H. Hmsorna citizen of the United States, residing at Philadelphia, in the State of Pennsylvania, have invented a certain new and useful -Improvement in Portable Electric-Lighting' Apparatus, whereof the following is a specification, reference being had` to the accompanying drawing. v

-' My invention relates to apparatus includin' an incandescent lamp in coperative relprovided wit Vao ` provement, Fig. II is ,al fragmentary front, elevationv -of sa1d casn with the cover 're.

. lation with a storage battery provided with means to attach it to the person of a miner or other operator, and provides a safety casin for the lampdesigned to extinguish the lig it t'o prevent ignition of fire-damp or ot 1er exp osive gases -when said casing is subjected to lamp.

As hereinafter described my invention ini cludes alam casing andlremovable cover a transparent lens or panel, normally assembled in 'substantially hermetical relation; said'casing having distinct 'o positely, polarized elements included in v t e glam circuit, so constructed and arranged t at they are shifted to modify-,the lamp circuit and instantaneousl extinguish the lamp,*whenev`er said casing 1s crushed or punctured. Said casing is detachably connected with a socket having an angle plate for engagement Wi'thamine'rs cap, and' a flexible connector extending from said sooket comprising an outer' flexible metallic 'tube constituting one conductor and. inclo'sing a flexible wire constituting the other conductor; the opposite end of said connector being shaped for detachable connection Awith a battery socket with which said lamp casingmay be directly connected without the intervention of saidfflexibleconnector. l

My invention includes 'the various novel features fof construction and arran ement stresses tending tobreak the .hereinafter more definite-ly specific ;l thel flexible connector vandappurtenances there of being claimed yin my copendin applica-v tion Serial #770,753 for-Letters atent of theUnited States, ggf" s g In the drawin 'z'.FiA-gure I` is a'n enlarged longitudinal sect1onalview of a' lamp casmg and flexible connector embodying my im- 'moved v Fig. I'II' is .a ont elevation of the nsulatingmng shown in Fig. I; but of the animallitige. ,i t

y slp'eomtlon of l 19, application and nay 29,1913. spel-:a1 110.770,75.

In said agnes; than p-,sin'lf .includes I -the outer'metalliccup-.shaped she 1 having the annularv ring seat 2 within the screw threaded flange 3 at its larger end, and h aving the cylindrical tubular shank 5 at its opposite end. The splitfring '6 of insulating material, -conveniently hardriibber or afrubber compOStion, is Seated in said screw flange 3 and-has the two annularggrooves-S and 9 interrupted 'by 'the 'abutment 10 formed by an ung'rooved portion of said ring 6. Said ring 36 has diametrically opposite panel recesses 12 and 13 to receive the respectivelyl opposite end corners of the rectangular vplane transparent ,panel 15, conveniently formedof glass, extending' transversely with respect to the axi's of said casing. Said casing is provided with there?" movable cover includin the annular metallic frame 17 havin .t e screw thread 18 fitted to the screw t read 3 on said shel1 1 land having the 4flange 19 overlapping the" edge of the' circular concave-convex trans.

parent panel 21, which is conveniently formed of molded glass, a d may be a lens.

VThe resilient gasket 22, co veniently formed of soft rubber, is fitted in lsaid cover band17 and `adapted-to bear upon the edge of said l panel 21 and upon said insulating ring' in said shell 1 so as to hermetical y seal the joint-between them. p

The plug of insulating material 24 is fitted in said outer shell sha-nk 5` and revented from rotating by the ke 25 whic extends in the keyway 26 1n sa1d plu 24 and has its inner end projecting throug the opening 28 in said outer shell shank.v The intermediate cup-shaped shell 29 has the flan 430 at its outer end -fitted in the' groove 8 o `said rin 6, and has the notch 32 coincident with.

abutment 10 in said ring wh1ch re v a1' ,intermediate shell 29 has t e Acylindrical vents said shellv from rotatin therein.

shank 34 'which' is connected with said plug 24 bythe axiall l Itends through said plug, havin the head 36 -within said" intermediate shel 29 and the nut 37 exterior to said plu 24 serving as the negative electrical' termina 'of saidl lamp casing, the positive ,te'rxn'inal beingjsaid' o uter .The inner parabolag'reaidr .stento his the flange 41 fitted to'fthe grooveS 1n`sa1d y ring 6 and has'the notch A@coincident with the abutment 10 insaid ring So that relative rotation of said -slgellis prevented.' `Said'in l i ner shellv 4t) has the cylindrical sha-nk 43 carrying the spring contact 45 having its in nei` end 'extending parallel with the axis of the lamp casing in electrical 'contact with "the outer surface of said shank of theI shell 40,. the opposite end of said spring 45 being normally upheld by said panel so as to press the bight 46 of said spring into electrical contact-with'theouter shell 1 as shown in Fig. I. ASaid spring 45 is rigidly connect-v ed Vwith said'inner reiiector shell 40 by the metallic collar '48 encircling said shank 43' and the end of said spring-as shown in Fig.

I; said collar 48, spring 45 and shank 43 being electrically connected with the screw threadedbushing 50 in `thelatter by solder..

Said bushing 50. fits the metallic screw threaded sleeve terminal 520i the incandes- .fcent electric lamp 53Which has the axial metallic terminal 54 in contact with the'liead 36 of said bolt 35; said inner shell 40 being held in concentric relation with said intermediate shell 29 by the band 56 of insulating material encircling said shank 43 on said inner shell 40 and extendingv into the shank 34 of the intermediate shell 29.

The tubular head socket 58 is fitted to extend over the plug 24 and shank 25 on said outer shell 1 of the lamp casing and has the bayonet slot 59 arranged to engage the pro- `.metallic thimble 70 in which is seated the Y which contact spring 71 arranged to make detachable electrical connection with said nut 37 0n the lamp casing. The exible metal tube 73, conveniently formed of a spirally` wrapped strip havin interlockingedges, is rigidly connected wi said socket 58 at one end and with. the hollow terminal elbow 74 at .the opposite end' the junction of said tube 73 with said by the spiral sprin idly connected wit asshown in Fig. I. The end of said elbow olpposite from saidspring is cylindrical, of t 4e same diameter as the amp casin shank 5, and has a locking projection (6 ike the .projecting end of said key 25 so that said casingrand elbow may be interchangeably fitted in the battery casing socket 78 in electrical connection with the batte 80; said flexible tube 73 serving as one coiiductor, the other conductor bein the exible wire82 extending through sai exible tube 73 from i t is insulated its covering 83. Said wire. is electri cover which isv rigelbow being reinforced said elbow at one end b. u?. Obnncted with:l

said. contact 71: in said head socket 58, vand with theterminal eyelet 85 which is mounted in the 'insulatin bushing 86 in the metallic .cap 87 in 'said w 74. As indicated in Fig. I said battery is connected upon one side with said'socket 78 and upon the Opposite side with the terminal 89 which is in electrical contact with said eyelet As indicated, said outershell l and inner shell 40 -are positively polarized by suitable connection with said battery 80, and said intermediate shell 29 is negatively polarized; so that if said outer shell 1 be crushedl into contact with the intermediate shell 29 said lamp 53 is short circuited and extinguished.- Moreover, if said glass panel 1.5 be broken or. otherwise* displaced said spring 45 snaps away from said outer shell 1 so as to break the circuit and extinguish saidlamp. Furthermore, said spring 45 which normally electrically connects said inner andl outer shells as shown in Fig. I, through the notch 32 in the intermediate shell 29 which is normally held out of electrical contact with said spring by the insulating abutment 10 in the ring 6, extends so close to the intermediate shell 29 that very slightdistortion of the lam casing causes s aid s ring to contact wit said intermediate s ell and thus short circuit and extinguish the lamp. In other Words, it is. to-be understood that both the metallic and transparent elements of said lamp casing are crushable so that when either is crushed or` displaced from its normal position the electric circuit is modi- Vfied to extinguish the lamp before it is possible for any incandescent portion thereof to ignite fire-damp or other iniammable gases from theatmosphere surrounding said casing.

I do not desire to limit myself to the precise details of construction and arran-gement herein set forth, as it is obvious that various modifications may be made therein Without departing from the essential features of my invention as defined in the appended claims.

1. In a, portable electric lighting apparatus, a lamp casing including an outer me'- t-allic cup shaped shell having an annular ring seat and a screw threaded flange at its larger end and a cylindrical tubular shank at its opposite end;'a split ring of insulating material in said seat, having two annular grooves interrupted by an' abutment` formed by an ungrooved portion of said ring, and' having diametrically opposite panel recesses;`a rectangular plane transparent frangible panel, extending transversely with respect to the axis of said casing` and having its diametrically opposite ends fitted in said recesses in said rin movable cover for said shell. including an' annular metallic-screw threaded frame fitted gnomes; i

to the screw thread onsaid shell, and a circular concave-convex transparent frangible panel fitted in said frame; a resilient gasket fitted 1n saidy frame, arranged to bear upon.

the edge of' said circular panel'and' upon said insulating ring in said' shell andher shell having a flange at itsouter end-fitted in o ne of the grooves o f said insulating ring, having a-.notcli coincident with said' abutment 1n said i1ng,'and a cylindrical shank;

a bolt extending axially through said vplug,

having: a head within said intermediate shell and a nut exterior to said .plug holding said intermediate shell in rigid relation with said plug and serving as an electrical lterminalan inner parabolic; reflector shell having a` flange fitted to the other groove in said ring, having a notch coincident with the abutment in said ring, and a cylindrical shank;

" a spring contact having one end extendingr parallel with the 'axis of the lamp casing in contact with the outer surface of the cylin-i drical shank of said reflector shell and having its opposite end extending in the notches in said intermediate and inner shells and normallyresting upon the adjacent endvof said rectangular panel; said rectangular panel normally holding said spring in electrical contact with said outer shell; a metallic collar encircling the cylindrical shank on said inner shell, holding said Aspring thereon.; a screw threaded lamp socket bush? ing in said inner shell shank electrically connected with said shell and spring; and, a. band of insulating material encircling the shank on said inner shell and extending into theshank on said intermediateshell; whereby said casing is 'adapted to hold an incan.

descent electric lamp. bulb having a screw threadedl metallic sleeve fitted to the bushing in said inner shell, and an axial terminal fitted to contact with the head of said bolt. l

2. In a portable electric lighting. apparatus, a. lampcasing including an outer meta-llic shell having a screw threaded flange at its larger end and a cylindrical tubular..

shank at its opposite end; an insulating ring in said fla-nge, having two annular grooves and diametrically opposite panelrej cesses; a. rectangular plane' transparent frangible panel, extending transversely with respect to the axis of said casing and hav-fing its diametrically opposite ends :fitted in said recesses in said ring; a removable cover for said shell including an annular metallic screw threaded frame fitted tol the screw thread on said shell, and alcircular transparent frangible ,panel tted 'in said frame; a resilient gasket fitted in said frame, ar-

' ranged to bear uponthe edge of said circular panel and upon said insulating ring in -v said shell and hermeticall-y seal the joint between them; a plugof insulating material said keyway and'havingone end extending through an opening. in `said outer shell,

. forming a locking projections an intermediate shell having va flange at lts outer end` fitted in. one of theggroove's. of said insulatn ing ring, and a cylindrical shank; a bolt extending axiallyl through said plug, holding said intermediate shell in rigid rel ation with said plug and-'serving as an delectricaltermiv.in said outer shell shank;- a keyway in said Aplug vwithin said shank; a keyeXtending-in nal; an inner reflector ,shell having a flange y fitted in' thc other groove in said ring. and al cylindrical shank: a spring' contact havingone end conncctedwithsaid reflector shell 4 and having its opposite. end 'extending'. in the notches in said intermediate and inner shellsffand normally resting upon the adjacent end of said rectangular panel; said -rectangular panel normally holding said jspring in electrical contact with said outer shell; a lampsocket bushing in said inner jshell` shank electricallyconnected with said .shell and spring ;f and, a band 0f insulating material encircling the shank on said inner shell and extending into the'shank on said intermediate shell; whereby said casing is yadapted' to Vhold an incandescent electric lamp bulb having a metallic sleeve fitted to the bushingin said inner shell, and an axlal terminal fitted to,l` contact with said bolt.

v3. In a portable electric lighting -appa.

ratus,'a lamp casing including an outer shell Y having a, connecting flange at its larger end and a tubular shank at its opposite'end; an insulating ring in said flange, having two annular grooves and panel recesses; a transparent frangible panel. extending transversely with respect to the axis of said casing and fitted in said'recesses in said ring; a removable cover for said shell including an annular frame fitted toy said connecting flange on said shell, and a circula-r transparent rangible panel fitted in said frame; a resilient gasket fitted in said frame, arranged to bear'upon the edge of said circular panel and. upon said insulating ring in said shell and' seal the joint between them;

a plug of insulating material in said outer shell shank; an intermediate shellv having a flange at its outer end fitted in oneof the l grooves of said insulating rin and a shank; a bolt extending through sai plug, holding ,saidintermediate shell 1n rigid relation with and inner shells and normally resting u on the adjacent end of said first panel; said Y rst panel normally holding said spring in electrical contact with said outer she l; and a lamp socket'bushing in'said inner shell shank electrically7 connected with said shell 'and spring;l whereby said casing is adapted to hold an incandescent electric lamp bulb haveA ing a metallic sleeve fitted to the bushing in said inner shell, and an axial terminal fittedv to contact with said bolt. I

4.' In a portable electric lighting appa-` ratus, a lamp casing including an outer shell having a connecting flange at its larger end and a shank at. its opposite end anleinsuf. lating ring in said ange, having t'woannular grooves and panel recesses; artransparent frangible panel, fitted in .said recesses in said ring; a removable cover for said shell including an annular frame fitted to said connectingflange on said shell, and a second transparent frangible .panel fitted in said frame; a resilient gasket'fittedvin said frame,l

arranged to bear upon the edve of saidsecondr'panel and yupon said'insuating ring in f said shell and seal the joint between themg, an intermediate shell 'having a flange at its outer end fitted in one of the Agrooves oit said insulating ring, and a shank; an inner shell having a flange fitted in the other groove in said ring, and a shank; a sprin v contact having one end connected with sai inner shell and having its opposite end normally resting upon the adjacent end of .said first panel; said lirstpanel normall hold-` in ysaid spring iii-electrical contact with said' outer shell; and a lampl socket bushing in said inner shell shankelectrically cop.-

nectedwith said shell and spring. 5. In a portable electric lighting apparatus', a lamp casing including an outer metallic shell having." a'- screw threaded flange at its larger' .end anda` cylindrical tubular shank at 'its ,oppositevendg anv in-A sulating ring'pin seat,l iaving two arin`ular groovesjand" diametrically opposite panel recesses; .a1 rectangular plane trans.-

parent frangibl'e panel,- extending transversely with respecta-tothe axis of. said casing and vhaving-y its-diametrically oppositeends fitted in said recesses in. said ring; a-

removable cover for said' shell including an annular metallic screw threaded frame fitted to the screw thread on said shell, anda circular transparent frangible panel fitted in said frame; aresilient gasket. iitted in said Jframe, arranged `*to 'bear- 4upon the edge of said c ircular'j panel and uponwsaid insulatin ring in said' shell'jja'nd hermetically seal t e joint between them'ya-n intermediate `shell having a flange atits outer end fittedv in one of the grooves of said insulating ring, and a cylindrical shank' anli'nner reflector fitted in v'the other` Gf In a portable electric resting upon. the adjacent end of said rec-I vtangular panel; said rectangular panel nor mally holding said spring in electrical contact 'with said outer shell; alamp socket bushing in said inner shell shank electricall connected with'said shell and spring;`an .a band of insulating material encircling thev shank on said inner shell and extending into the shank on said intermediate shell; wherebysaid casing is adapted to hold an incandescent electric lampbulb having a metallic .sleeve tted to the bushing in said inner groove in said ring, and a cylindrical shank;V

shell,l and an axial terminal fitted to Contact Y I.with -saidbolt.

l lighting apparatus, ,a lamp `casing includingl an outer metallic shell having a vscrew threaded flange at its larger end and a` cylindrical tubular, shank at'its opposite end; an'insulating ring in said seat, having two annular grooves and diametrically opposite panel recesses; a rectangular. plane transparent. frangible panel, extending transversely with respect to the axis of said. Casin iand having its diametrically opposite en s fitted in said recesses in said ring; a` removable cover for said shell including an annular metallic screw threaded frame -tted to l.the Screw thread'on said shell, 'anda circular transparent frangible panel-tted in said frame;

a resilient gasket tted in said frame2 arranged to bear upon the edge of said circu-A lar panel and upon said insulating ring in said shell 'and hermetically seal the joint between them; an intermediate shell havinga flange at its outer end fitted in one of the grooves 'of said insulating ring, and a cylindrical shank; an inner reflector shell having a flange fitted inthe other groove in said ring, and acylindrical shank; a spring contact'having one end connected with said reflector shell and having its opposite end extendin in the notches 1n said 1ntermediate and lnner shells and normally restingl upon the adjacent end of said rectangular panel; said. rectangular panel normall holding said's ring in electrical contact wit said outer 'she l; and a lamp socket bushing said inner shell shank electrically connected with said shell and spring. A

. ''.fln a'portable electric lighting apparatusl .a lamp casing includingan outer shell hav-ing a screw threaded flange at its larger end 4and a cylindrical tubular shank at its opposite end; an insulating ring in said seat, having two annular grooves and panel recesses; a transparent frangible panel, ex-

tendin transversely with respect to the axis ofsai casing and fitted in said recesses 1n sald ring; a removable covenfor said shell ico including anaiiiiul'ar screw threaded frame I iitted to the' screw .three-don said shell, and

acirculartransparent frangible'panel fitted' in said frame; a. resilient gasket fitted in said frame, arranged to bear upon theiedge of said circular aneland upon said insulating yring in said shell and seal lthe joint tact havin between-them; an intermediate shell having a flange at its outerend fitted in one ofthe grooves of vsaid insulating ring,'and' a cylinrical shank; an inner reilectorshell. having a flange-'fitted in the other groove in sai ring, and a cylindrical shank' la spriiigconone end connected with said re- 'Hector shel and .having its opposite end extending in the notches. in said intermediate and inner shells and normally restingupon the adjacent end of 4said rectangular lpanel; said rectangular panel normally holding said spring in electrical contact-with said outer s ell'; a lamp socket bushing in said inner shell shank electrically connected with said shell and sprin and, a band of insulating material encirc ing the shank on said inner shell and extending into the shank on said intermediate shell.

8. In a portable electric lighting appara-` tus, a lamp casing includin an outer me-l tallic shell having a screw t readed liange at its larger end and a cylindrical tubular shank at its fpposite end; an insulating ring in said ange, havin .two annular ooves; an intermediate s ell having a ange at its outer end fitted in one of the rooves of said insulatin ring; an innerreector shell having aange fitted in the other groove in said ring; a contact s ring permanently connected with said re ectorl shell and normally in contact with `said outer shell; and a lamp socket bushing in said inner shell electrically connected therewith; `whereby said contact spring coacts with the other elements of the apparatus to break the lamp circuit when thel lamp becomesl exposed to the atmos here. .9. yIn a portable electric ighting apparatus, a lamp casing including an outer metallic shell having a coniiectin flangeat its larger end and a tubular shan at its opp'o site end; an insulating ring 'in said flan e,

. having two annular ooves; an interme i ate shell having. a nge atits outerend itted in one of the groovesof Said insulating ring; an Iinner reflector shell having a flange ttedl in lthe. other groove insaid ring; a contact spring ermanently connected with said reflector contact with said outer shell; and a lamp socket bushin in said inner shell` electri therewith; whereb1 said conements of the lamp becomes exposed to the atmospheraf 1tact springcoacts with the other e ell and normally in cally -connec the apparatusA to break the lamp circuitwhen 10. In a portable electric lighting apparatus, av lamp casing includingv an outer ing material encirclin metallicxjshellf; an" insulating Vring in 'said flange, having two annular grooves; an intermediate shell having a @ange at its outer endiitted in .one of the'grooves of said insulating ring; an inner reflector shell havin a flange-fitted in theother groove vin said ring; and a lamp socket bushing in said inner shell electrically connected therewith. 11. In a portable electric lighting apparatus, a lamp casing including 4an outer metallic shell' having'an annular ring 'seat and .a screw threaded flange at its larger end and a pylindrical tubular shank at its oppofsite en `s lit rng'ofinsulating material in. said seat,v aving two. annular grooves interrupted by 'an abutment formed by an ungrooved portion of said ring, and havingI panel recesses; a frangible panel lftted in said recesses'in said ring; a removable cover for said shell; an intermediate shell having a iange at itsouter end -fitted in one of the grooves o f said insulating ring, having a notch coincident with said abutment in said ring; an inner parabolic reflector shell having a iiange fitted to the other groove in said ring` having a notch coincident with the labutment in said ring', and a shank; a sprin `contact having one end connected with sai ratus, a lamp casing including an outer Ametallic shell having an annular ring. seat and a connecting flange at its larger end and a shank/at its opposite end; a split ring of insulating material in said seat, having two annular grooves interrupted b an abutment, and having anel recesses; a rangible panel fitted-in said) recesses in said ring; a removable cover for said shell an intermediate shell having a flange at its outer end fitted in one of the groves of said insulating ring, hav# .fing a notch enga 'ng said abutment in said ring;` an inner re ector shell having a ange fitted to the other groove in said ring, having a notch engaging the abutmentin said ring, and a shank;'a sprin contact having one end connected with said reflector shell and having itsopposite end extending inthe notches in said intermediate and inner shells 'and'. normali restin upon said panel; Said panel norma lyl hol in saidspringin electrical contact with sai 'outer shell alamp f nsaid inner sliellelectncall socket bushing: connected wit said' shell and Ispi'ii'ig';.an

.a band of insulating material encircling the ias iso

the shank on said intermediate shell.-

13. In a portable electric lighting appa# ratus, a lamp casingl including an outer 5 metallic shell having a connecting Bange at its larger end and a shank at its opposite end; a split ring of insulating material in said seat, having two annular grooves, and

having panel recesses; a frangible panel 10 fitted in said recesses in said ring; a removable cover for said shell; an intermediate shell having a flange at its outer end fitted in one of the grooves of said insulating ring; an inner reeetor shell having.,` a

15 flange fitted to the other groove in said ring,

- hasta shank on said inner shell andextending w1 a Shank.;` and a contact ha i' ("iie end. connected with said reflector she and having its'tpposite. end normally re8t ingupensaid panel; panel normally holding. said spring inxelectrical .contact 2).

with said outer shell; a lamp socket bus in said shell electncally connecte with said shelland spring. f

In testimony whereof, I have hereunto signed my name at Philadelphia, Pennsyl- 2.5.

Vania, this 24th day of May, 1913.

i l HIRAM H. HIRSCH. Witnesses: j

S. T. HANNIGA, 1 lKirrnmm M. DoNoHUE. 

